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Feb. 22, 1927. I a F JANCKE HEATER FOR HAIR WAVING Filed De0.28, 1925 INVENTOR Q By Attorne s, M

mate Feb. 22,1921.

too hot for handling with bare hands, and

UNITED Y. STATES BENNO FREDERICK J'ANCKE, OF NEW YORK, N. Y., ASSIGNOR '10 SIHIEL'J.O1\l'--J'ANCKE PATENT I OFFICE.

,OOEPORATION, OF NEW YORK, N. Y., A CORPORATION OF NEW JERSEY.

7 HEATER FOB HAIR WA VING.

Application filed December 28, 1923. Serial No. 683,202.

This invention relates to improvements in heaters for hair waving, and aims to provide improvements therein.

Heaters such as are generally used at present are objectionable in that they are cause painful burns in cases of accident.

The aim and purpose of the present invention is to provide a heater which is so cool externally that it may be handled with bare hands, and which is not liable to cause burns like thoseheretofore generally used. The heater of this invention also requires to be supplied with a less amount of heat than those heretofore generally used.

An "embodiment of the invention. is illustrated in the accompanying drawing, of which,

Figure 1 is a side elevation;

Fig. 2 is an end view;

Fig. 3 is a vertical sectional view, and

Fig. 4 is a horizontal section.

Referring to said drawing, numeral 10 designates a hollow tube or double-walled chamber,'preferably bf heat resistant glass,

. the interior of which exhausted, as in the Dewar vacuum bottles. The inner faces of the tube are preferably made reflective, as by being silvered, as indicated at 13, so as to reflect heat rays.

A heating means 15 isplaced inside of the tube 10, as shown in Fig. 3, and the heating means 15 is preferably an electrical resistance in the form of a coil of wire 17. The wire is preferably bare and spaced apart in the coils. A sheet of mica 19 is conveniently placed between the coil 17 and the inner wallsof the tube 10, and a metal sleeve 21- is preferably placed inside of the coil 17 so as to enclose the coil between the hollow tube 10 and the metal sleeve 21, The ends of the sleeve are preferably turned .in against the hollow tube 10, as indicated at 23, 24, so as to tightly enclose said coil 17.

2A sheet of mica, or the like, is preferably placed between the coil 17 and the sleeve 21. The tube 10 is conveniently formed with an finner annular rib 25 at or near one end,

the radiant heat waves. The heat of the resistance coil 17 is therefore confined inward of the tube 10, so that the exterior of the tube 10 is always comfortable for handling with bare hands, very much facilitating the dressing of the hair, the applying of the heaters, their adjustment during the period of heating, and the rescue of the subject in case of some accident which produces discomfort. Moreover, by reason of the less radiation of heat, in the caseof an electric heater, less current is necessary for producing and maintaining a desired temperature, which reduction of current consumption is important in this class of heaters.

The invention may receive other embodiments than that herein specifically illustrated and described.

I claim as my invention:

1. A heater for hair curling comprising a tubular'part adapted to receive a strand of hair Within it, an electric heating element, and an exterior double-walled exhausted chamber forming a heat non-conductor to prevent outward radiation of heat and keep .the exterior of the device cool so that it may be readily handled.

'2. A heater for hair curling comprising an inner tube, an electric heating element around said tube, and an exterior doubleed double-walled tubular chamber externally surrounding said element, said chamber 10 having a sealing tube to which the wires leading tov said heating element may be fastened. In witness whereof, I have hereunto signed m name.

BENNO FREDERICK JANCKE. 

